Method of forming dental anchoring devices



Nov. 11 1924.

H. E. S. CHAYES METHOD OF FORMING DEN TAL ANCHORING DEVICES Filed April 21, 192?,

Patented Nov. ill, i924.

HERMAN E. S. GHAYES, OF NEW YORK, N. Y.

METHOD OF FORMING DENTAL ANCHOR-ENG DEVICES.

Application filed April 21, 1922.

To all whom it may concern:

Be it known that I, HERMAN E. S. CrIiiYns, a citizen of the United States, residing at New York, in the county of New York and State of New York, have invented certain new and useful In'iprovements in Methods of Forming Dental Anchoring. Devices, of which the following is a specification.

This invention relates to a method for forming dental anchoring devices such as are described and claimed in my-pending application Serial No. 486,102, filed July 7, 1921.

The invention includes the preliminary forming of an elongated member whose cross-sectional dimensions coincide with the cross-sectional dimensions of the anchoring members to be formed, and in dividing the elongated member transversely into sections to produce the individual anchoring devices.

The specific anchoring device described and claimed in the pending application referred to consists of a T-shaped member having its laterally extending head portion slotted inwardly from its opposite lateral edges to rovide wing members which can be sprea apart to provide frictional engagement with the inner surface of a socket or seat formed to receive them. The slotted condition of the head member, which is difficult and expensive to produce in the anchoring members individually, is effected in the elongated member before the trans verse dividing operation is performed.

Other features of the invention will be hereinafter referred to.

In the drawings in which a preferred form of the invention has been selected for illustration,

Figure 1 is a view in perspective of an anchoring device made in accordance with the invention.

Figure 2 is a View in perspective showing an operation of an elongated member preliminarily formed as a base structure for a plurality of anchoring devices. v

Figure 3 is a view similar to Figure 2 showing expansion slots and dotted lines 5 showing proposed cutting operations.

Figure 4: is a view in end elevation of the device shown in Figure 1 on a reduced scale and showing the expansion of the slotted portions to engage anchoring sockets.

Figure 5 is a view in perspective showing Serial No. 555,924.

a suitable form of socket to be used with the anchoring device described.

Referring to the drawings there is shown in Figure 1 a dental anchoring device of the same general type as is described and claimed in my pending application already referred to. This anchoring device consists of a stem member 5 adapted to be permanently seated in an artificial dental member and with a laterally extending head memher 6. It will be seen that the stem member 5 and the head portion 6 taken as a whole form a 'T-shaped device. The oppositely disposed lateral edges of the laterally extending head portion 6 of the device are provided with inwardly extending slots 7. The slots 7 serve to provide wing members 8 which can be spread apart as indicated in Figure 4 of the drawing to thereby bring about any desired degree of frictional contact with the inner surfaces of a socket member 9 such as is shown in Figure 5 of the drawing.

The socket member 9 is intended to be seated in a natural tooth which is thereby made to provide a pier or seat in which the head portion 6 of the anchoring device can be received. The socket member 9 is provided with a recess 10 in its exposed side wall which it will be seen does not extend completely to the bottom of the socket and which is formed to receive the stem portion 5 of the anchoring device. It will also be noted that the anchoring device has a portion 11. of the head member 6 formed to extend be yond the adjacent endsof the stem portion and'to fit within the lower portion of the socket 9 beneath the lowermost edge of the opening 10 to thereby increase the effectiveness of the engagement of the anchoring device in the socket.

In order to eiiiciently produce the anchoring devices which because of their relatively small size cannot have operations performed upon them individually, except at a considerable loss of efficiency and correspondingly increased expense, I have found that I can conveniently form a. preliminary base structure having the same conformation of an elongated rod 12 or bar having a T-shaped cross-section as is indicated in Figure 2 of the drawing. The elongated member 12 is formed in any suitable manner as by rolling, extruding or other operation performed upon the chemically inert and non-corrosive lei) metal chosen for the purpose. Following the basic forming operation the elongated member is subjected to a slitting or cutting operation in order to form in the lateral margins of the head portion 6 the already referred to slots 7. It Will be seen that the production of the slots 7 can be much more effectively and accurately formed, in the elongated members 12 than in the short and relativelysmall members such asare represented by the final product shown in Figure l of the drawing.

renewing the forming and slitting operations referred to the stem portion 5 of the elongated member 12 is subjected to transverse 01' ciittiiig operations at the points 13 The cuts produced at 13 do not extend through the head portion but merely to the junction of the head portion 5 to the head portion 6. The elongated 1ne1nber 12 is then subjected to a transverse dividlng operation which takes place at the divisional points indicated at 14C, in Figure 3 of the drawing. The cutting or dividing operations performed at 14' divide the bar into sections, each having" a length coincident with the length of the individual anchoring devices to be produced. Following the dividing operation the portion of the stern member of'e'a'ch section indicated at 15 is remevedm thereby bring about the extension ll of the head portion 6 already referred to beyond the adjacent end of the stem portion 5 and cause the length of the stein por p pond to the depth of the slot 10 in the so'ket 9. p 4 p v The division er the elongated T-shaped bariiito the se'c tionsindicated Will, as ivill be clear, produce the individual anchoring devices described. The spreading apart [of the ivingmen'ib'ers 7 formed by the laterally e itenclii'rggmargins of "the head member 6 is effected as indicated in Figure i of the dmeiag to producethe desired grip or clamping engagement of the socket members with the head portions fof the anchoring devices The forming and cuttingopera tions which are produced in the manner 1iidicated on an elongated bar form What is in effect a plurality or series of potential anchoring devices greatly increase the efficiency of production of the devices and substantially reduce the cost of manufacture thereof. The anchoring devices thus produced are particularly useful becauseof their expansible feature by reason of Which they can be expanded or enlarged to produce any desired degree of snugness of fit in the receiving sockets.

What is claimed is: I 1. The method of making T-shaped anchoring devices having expansible head portions, Which consists in forming an elongated member having a T-shaped crosssection; in slitting the member 'longitudr nally throughout its length along a lateral edge of the head portion of the T-shaped formation perpendicularly tothe stem of the T; in cutting through the elongated member at spaced intervals corresponding to the length of the head of the devices to be produced, and in ren'ioving a portion of one end of the T-s'tem of each device, so that the T-head portion thereof is longer than its Tj'stem. v 1 p 2. The method of making T-sha'ped anchoring devices having expansible head portions, yvhich consists in forming an elongated member having a T-shaped crosssection in slitting theme mb'er longitudinally throughout its length along each lateral edgeof the head portion of the i sh'a'ped formation but In the same plane, and so thatthe inner ends of the slits are spaced apart by a median portion of the head; in cutting through the elongated member transversely at spaced apart intervals corresponding to the length of the head of the devices to be produced, and in rein'ov ng a {portion of one end of the T-stein of eachde-vice, so that the T h'e'ad portion thereof is longer than its T-stein in te'stiinony"whereof l affia my signature.

HERMAN E: S CHAYES. 

